AHR连接体的内皮传感调节肠道平衡
Benjamin G Wiggins1,2, Yi-Fang Wang3, Alice Burke4,3
1Institute of Clinical Sciences, Faculty of Medicine, Imperial College London, London, UK. bwiggins@ic.ac.uk.
Nature
|August 16, 2023
概括
甲基碳化合物受体 (AHR) 帮助内皮细胞感知肠道中的饮食信号. 这种感知促进了血管的正常状态,并防止了炎症和感染,维持了肠道平衡.
科学领域:
- 血管生物学
- 免疫学
- 胃肠病学
背景情况:
- 内皮细胞在血液和淋巴血管中形成关键屏障,调节营养物质的运输和组织免疫力.
- 肠道依赖于饮食和微生物信号来实现平衡,但内皮细胞对这些信号的感知程度尚不清楚.
- 已知基碳酸受体 (AHR) 会对环境因素作出反应.
研究的目的:
- 研究肠内皮细胞在感知饮食信号中的作用.
- 为了确定基碳水化合物受体 (AHR) 是否调解内皮细胞对食代谢物的反应.
- 了解内皮细胞中的AHR信号如何影响肠道平衡和免疫反应.
主要方法:
- 产生小鼠小肠的单细胞内皮图谱.
- 在单细胞分辨率下分析内皮细胞中AHR介导的转录反应.
- 在内皮细胞中研究AHR功能,使用内皮AHR缺陷和人类初级内皮细胞的小鼠模型.
主要成果:
- AHR作为内皮细胞感知食代谢物的关键媒介.
- AHR信号促进组织保护的转录特征,导致内皮细胞静止和血管正常.
- 在小鼠中,内皮AHR缺乏导致炎症失调和增殖反应.
- 对于对肠道感染进行保护,内皮AHR连接体检测至关重要.
- 在人体内皮细胞中,AHR信号抑制了炎症激活,促进了静止.
结论:
- 内皮细胞的AHR信号整合了饮食线索以维持肠道平衡.
- 促进内皮细胞静止和血管正常,对于组织保护至关重要.
- 通过AHR感知内皮细胞的环境对肠道健康和免疫防御至关重要.
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